Gas-burner.



A'. G. SHERMAN.

GAS BURNER.

APPLICATION FILED MAR. a, 1911.

Patented N0v.14, 1911.

A X474 2m Eimmsrs TED STATES PATENT Enron.

ALVIN G. SHERMAN, OF DETROIT, MICHIGAN.

' GAS-BURNER.

Specification of Letters Patent.

Patented Now 14, 1911.

Application filed March 8. 1911 Serial No. 613,130.

To all whom it may concern:

Be it known that I, ALVIN G. SHERMAN, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Gas-Burners, and declare the following to be a full, clear, and exact H heat across the surface of the burner and in which provision is made forthe proper access of air to the flame.

It is well known that for the proper combustion ,of a mixture of any gaseous or vaporous fuel and oxygen, that there not only must be the proper primary mixing of air and gas, or. oxygen and gas, but that at the place of combustion where the mixture is fired there must'be a secondary access of air, and to get the best results this secondary access of air. mustrise freely from near the bottom of the little flame of burning gases. There have been many burners made in which provision has been made for produc-' ing thisaccess of secondary air to some of the llttle ets ofburmng gases lssumg-from the burner, but no one, so far as I am aware,

has devised a burner in which the jets ofburning gas maybe increased indefinitely, and all of them be provided equally well i with access of secondary air.

In the embodiment of this invention provision is made for a substantially equal access of air to each-one of a great number of burning jets which may be increased in;

definitely.

In the drawings :-Figure -1, shows a bur-- ner in plan view; Fig. 2, is a cross section on the line w-m of one branch of the burner.

The burner is made preferably as a casting with an inlet pipe 2 which conducts the gas from the source of supply to the interior of the large head of the mixing chamber 3,

in which the branches or extensions 4:, 5, 6,

7, 8 and 9 radiate froma central chamber and expand at their terminals into semicircular chambers 10, 11, 12, 13, 14, 15. The branches 4 and 5 are so related that the line of burner holes from the center of the branch 4 to the center of the branch 5 is itself semicircular and intersects a circular line which is central to the inner portion 1 of. the head. Each semi-circular chamber at the extremity of a branch intersects the circular center line of two adjacent branches, and along its center line the shell of the burner is bored for thejet mouths 21. The jet mouths for the outer semi-circular chamber in the chamber 15 are arranged in a semicircle whose center is located at the point a in the open space between the Iconstituent arms or branches of said extension 15. The jet mouths issuing from the chamber between the branches at and 5 are located equidistant from a center located at b, and this are of jet mouths having its center at b intersects the arc of jet holes of the semicircle of jet holes having its center at a, so that the jet hole 23 iscommon to both. Thejet hole 24 is common tothe semicircle of holes having its center at wand the arc of holes having its center at c, and the holes 22'and 26 are com-' mon to'the holes centered at b and centered at c. In this way each circle intersects two at least ofv the other circles of holes in the 1 burner head. This arises from the construction in which there is in the head a central circle of jet holes surrounded by aplurality of arcs of jet holes, each of which intersects the central circle, and each of which intersets twoof the circles lying adjacent one on either side. Around this row of circles, as shown in the drawing, there is another-row of half circles. The holes are all equally spaced from each other, and all substantially equally spaced fromthe margin of the casing of the head so that the access of air to each opening is substantially uniform to that of any other hole in the burner head. What I claim is .1. A gas burner, comprising a casing having a centrally apertured central portion and branching radial extensions therefrom,-

each extension being spaced from thoseadjacent by an intervening air space the top surface of both the central portion and its branching extensions being perforated with a plurality, of burner jet apertures, said apertures being spaced equidistant from one another and being arranged in intersectingarcs about the open air spaces which separate the extensions from one another, substantially as described.

' 2. In a gas burner, a casing provided wlth a plurality of branching extensions spaced from one anotherand whose innermost portions are substantially radial in extent, all portions thereof being provided on their upper side wit-h burner jet apertures arranged equidistant from one another in intersectlng arcs the center of each of which is located in an open air space between two adjacent extension port-ions, substantially as" described. v

3. In a gas burner, a casingl ing branch portions arrange member havabout a oen-' tral portion with open airspaces separating substantially as described.

the adjacent sides thereof, both the body portion and the branch portions of the-casing'beingprovided with burner jet apertures equally. spaced and arranged in series ofaround an air space separating two of the branch portions of the casing,

In' testimony whereof, cation in the presence of two witnesses.

ALVIN (-Er'.'SI-IEB'MAIflZ- Witnesses: v

CHARLES F. BURTON, VIRGINIA C; SPRA'IT. 

